Gas-range burner



July 10, 1928.

P. S. HARPER GAS RANGE BURNER 1L w m 2 y l g u u Patented July 10, 1928.

UNITED STATES PHILIP S. HARPER, OF CHICAGO, ILLINOIS.

GAS-RANGE BURNER.

Application filed August 24, 1927. Serial No. 215,017.

This inventionrelates to gas burners of the type generally used on gas ranges, hot plates, and other cooking and heating applianccs, and applies solely to adouble burner 6 having a plurality of mixing tubes and a similar number of burner sections.

This invention consists of a double gas burner with a single gas cock, having a particular combination of gas passages as hereinafter described and claimed.

The object of this invention is a gas. range burner having two sections in which the flame is lowered in both sections as the cock lever is turned in a counterclockwise direction, and in which on further turning in a counterclockwise direction the flame is entirely cut ofi from one section while the other section burns with a full flame.

Another object of this invention is a double burner in which all the functions take place on turning the cock lever in a counterclockwise direction the same as on a single burner.

These and other objects of this invention 26 will be apparent from the following description and from the drawings in which Figure 1 is a partial sectional elevation'of a burner, air shutter and gas cook of the type of this invention shown in the regularly assembled position; and

Figure 2 is an elevational view of ,the lower end of the gas cook body.

Referring now to the drawings, a manifold pipe 10 is slfown'into which is screwed 85 one end of the gas cock body 11, said end having a passa e 12 therein which continues into the tapered plug 13, said plug having a ground bearing 14 in the said body 11 as i in the usual gas cock.

The said passage 12 is enlarged at point 15 in said plug and then passes out of the plug intothe threaded nozzle end 16 where it is again enlarged at 17 for accommodation of the nozzle jet 18. Said nozzle jet is milled 45 longitudinally so that gas may pass from passage 12 on each side of the said jet. On

the threaded nozzle end 16 there is screwed a nozzle cap 21 having in its outer end a centrally placed orifice 22. This jet 18 in com- 50 bination with the nozzle cap 21 forms an adjustable nozzle, and the cap 21 is screwed more or less on the threads of the nozzle end 16 causing the jet 18 to enter the orifice 22 if conditions require so as to throttle this 65 orifice.

Returning now to the passage 12, before entering the plug a smaller pilot passage 23 leads off therefrom into a passage 26 in the casing 11, which passage 26 passes through the plug 13 and is substantially parallel to the former passage 12 of the said plug. Said passage 26 is larger. than both the small part and the enlarged part of passage 12 for purposes hereinafter to be set forth, and said passages may be drilled at slight angles from each other for the same purposes.

In the said plug 13 there is a diagonal equalizing passage 32 connecting the pas sage 26 with the passage 12. From the outer end of passage 26 there leads a connecting passage 33 to an enlarged horizontal passage 34in the threaded upper nozzle end 35. The outer end of passage 26 is closed by a stopper plug 36 substantially as shown. The said nozzle end is fitted with a jet 37 and cap 38 similar to the lower jet 18 and lower cap 21 except that the orifice 39 in the cap 38'is very much smaller than the former orifice 22 in the cap 21.

The lower end of the plug 13 has an extension 40 which'extends through a washer 41, a coil spring 42 and a stop washer 43. Said stop washer is held in place by the stop pin 44 which passes transversely through the lowor end 40 of the plug 13, and said washer has stops 45 limiting the turning of the plug to substantially 90 degrees. The under surface 46 of said stop washer'43 forms a cam which bears-on stoppin 44 and has one or more radial depressions or slopes therein engaging said pin in intermediate positions as required between the two 90 degree stop positions. The coil spring 42 is compressed between the washer 41 and the stop washer 43 and serves to maintain said stop washer 43 on its cam surface 46 in bearing against said .stop pin 44. The stop Washer 43 is guided on the lower end of. the casing 11 as shown and, has internal ribs (not shown) ex tending into slots in said casing preventing rotary movement, but said washer is free to slide in said slots in a longitudinal direction. The head 48 of said plug 13 has a stove bolt 49 threaded therein and serves to fasten on the porcelain handle 50, all in actice.

The nozzle caps 21 and 38 project through an outer shutter 51 and an inner shutter 52, said shutters being fastened to the mixer face 53 by the clamping screw 54. Nozzle cap 21 projects into a mixing tube 55 and -cordance with standard gas range cock prac- 50.1 passing through the said mixing tube has side passages 56 leading therefrom into the outer burner section 57 which is of the usual vstarshape or any other shape desired and has burner ports 58 in the top surface thereof after the manner of the usual "construction of gas. range burners. per mixing tube 59- which in turn leads di-, rectly to the boiling b'urner section 60 which has burner ports 61 in the top thereof.

These ports 61 are spaced in a circle or otherwise conveniently arranged to provide a small boiling burner-or so called simmer burner. The air shutter ports are arranged so that by rotation of the outer shutter 5 1 the air supply to both burner sections is adjusted in properproportion to the'gas burned by each, as disclosed'in my co-pending application Serial No. 192,852,1iled May m 20, 1927. i

As to the operation of invention, the plug 13 in the rotary position shown, a full gas supply passes through the port 12,

equalizing passage 32, and ports 15, 16,33

and 34, and so both the burner sections 57 and 60 burn with afull height flame from their respective ports 58 and 61. As the plug 13 is turned in a counterclockwise directlon the port 12 is-entirely open, since these latter orts are larger than port 12 and as hereinbe ore/stated, may also be drilled at slight angles to the port 12. to accomplish the same result. In this position with port 12 first closed, the entire gas supply to the burner passes through the small pilot port 23 and consequently the gas supply to the burner is greatly diminished, This gas passing through pilot port 23 passes into port 26, through ports 33 and 34 v to the upper burner section, and part of said gas passes through the equalizing port 32 through ports 15 and 16 to the lower burner section; consequently both burner sections burn but with a greatly diminished flame.

Now with further turning of the plug 13' in a counterclockwise direction the port 15 is next entirely cut ofl' while port 26 is still open, and then the entire volume of gas ilot port 23 passes through the port 26 and the ports 33 and '34 and is burned by the smaller burner section 60. The pilot'port 23 is large as compared with the nozzle opening 39 to the small section in about the same ratio as theport 12 is large as compared with the lower nozzle opening 22. Consequently, the small section burning alone with all-the gas passing through the pilot port 23 burns with a full 50 height flame the same as whenvboth sections are fully turned on in the position of. the plug shown in the drawing.

At the time that the port 15 is fully closed.

011', shutting ofl' all gas supply to the lower so burner section, the stop plate 43 in combina The upper nozzle 38- projects into up-.

closed ofi,. 30 while ports 15 and'26 are still somewhat port'26and consequently to lower the flame in" the section and still further turning cut-s ofl thisflame entirely and the entire burner is so shut off with the plug in the same position as the shut off position on.a

single burner. 1 v

The sequence of operations on this burner is such that with a wide open plug a large flame. is available for quickly heating a vessel to the boiling point; a slight turning 'ves a lowered flame of large area as might e'used 'for frying; further turning gives a simmer or boiling flame which is very eflicient for keeping a covered vessel boilin and still further turning gives a low sma flame which is desirable tokeep foods warm I i for serving without, further cooking. It

is seen that in this burner .I have combined the useful results of a large an'd small burner, while the cock is always opened'or closed forraising or lowering the flames in the samedirection as with the standard single burner. I

While I have described more or less prethereto, as I contemplate changes in form and the proportion of parts and the-substitution of equivalents as circumstances'may suggest or render expedient without departing from the spirit or scope of my invention.

I claim;

1. 'A double gas range burner with a gas cock having a single lever handle and two gas nozzles, each of said nozzles projecting into a mixing tube leading-to a burner sec- .cisely the details of construction, I doinot wish to be understood as limiting myself tion having a plurality of burner ports therein,'a large passage with connecting passages therefrom leadin'g tov both of said gas nozzles in one position of said plug, a

smaller passage with connecting passages leading to both of said gas nozzles in another position of said plug, said plug having passages leading to said burner section's arrangedso thaton rotation of said plug; one ofsald passages closes before the other. 7

2. A double gas range burner with a gas cook having a single plug and twogas nozzles, each of said gas'nozzles projecting into" a mixing tube leading to a burner section having burner ports therein, said plug hav- 1ng two passages therethrough each with connecting ports leading to one of said gas nozzles, one of. said passages closing before the other on rotation of said plug, two separate gas supply passages entering said plug at different points in its bearing. surface and each leading to one of the passages in said plug and one of said gas supply passages closing before the-other on rotation of said plug, and an equalizing passage connecting the two passages in said plug.

3. A double gas ran 0 burner with a gas cock having a single p ug and two gas nozzles, each of said gas nozzles leading to a burner section with a plurality of burner ports therein, said plug having two passages therethrough with connecting passages respectively each leading to one of said gas nozzles, said plug having an equalizing pass sage therein connecting the two said passages through said plug, the two passages through said plug arranged to close on rotation of said plug one before the other on the side leading to said gas nozzles, indicating means showing when one of said passages is closed, said passa es arranged toclose on rotation of said p ug one before the other on the side of gas inflow to said plug, said body having a large passage leading to the openingon the side of gas inflow of one of said two passages in said plug, and said parts having a separate smaller passage with connecting passages from the point of gas supply through the opening of the other of the two said passages through said plug on the side of gas inflow.

Signed at Chicago, Illinois, this 20th day of July, 1927.

- PHILIP S. HARPER. 

